Abstract: An insulation resistance detection system for use with a vehicle having a chassis. The system includes an electrical power source, an electrical system, and a detection circuit. The electrical system is electrically isolated from the chassis. The detection circuit is powered by the power source. The detection circuit includes a resistor electrically connected to the chassis. The detection circuit measures the voltage across the resistor to thereby determine insulation resistance between the electrical system and the chassis.

Abstract: A vehicle-mounted ultrasonic velocity sensor includes an ultrasonic transmitter and receiver coupled to transmit and receive horns. In one embodiment, a phase-locked-loop signal processing circuit converts the transmitted and reflected frequencies into a signal indicative of the vehicle velocity. In another embodiment, velocity data is obtained by measuring the period of a certain number of cycles of the reflected signal using a pair of counters, one counting at a rate equal to the reflected frequency, the other counting at a fixed rate. In both embodiments, the variable magnitude reflected signal is applied to an input of a drop-out detection circuit whose output is then connected to an input or inputs of the velocity determining circuits to prevent velocity detection during dropout periods.The velocity sensor may be implemented utilizing radar components.

Abstract: A rectangular baler has a preservative applicator for applying a fluid preservation to crop material as it is being baled as a function of the baling rate. The application rate is determined by a control circuit which repetitively measures the displacement of a charge of crop material through the baling for each cycle of the plunger and which repetitively opens solenoid controlled valves regulating a pressurized source of fluid preservative for a length of time proportionate to the magnitude of the displacement signal for one plunger cycle.